Condensed:
Visits at the tomb “on the First Day”:-
1) “Mary sees the stone removed”, “while being early darkness still”, dusk. Then Peter and John go to the tomb to see what Mary has told them. (Jn20:1-10)
2) “Earliest morning- darkness”, just after midnight, “the two women” (variant – the two Marys), “and certain others with them”, for the first time, “came to the sepulchre, bringing the spices they had prepared”. (Lk24:1) “They returned from the sepulchre, and told all these things to the eleven and to all the rest.” (“Then Peter stood up and ran to the tomb; and bending low over, he saw the linen clothes. He went back, wandering by himself about that what had happened.” (Lk24:9-12) Cf. John's account in 20:1-10. I can't say Luke talks of another visit by Peter, but it seems true because Luke doesn't mention John.)
3) These women to make sure, a second time came to the tomb “very early before sunrise”. (Mk16:2)
4) Mary from after the others had fled in fear (Mk16:8)
“had had stood without at the grave” (Jn20:11). At the time a gardener should begin work, about sunrise, Jesus “early … first appeared to Mary”. (Mk16:9)
5) Soon after – after they a third time have visited the tomb and “the angel explained” to them what had happened during the Resurrection – Jesus appears to the other women “as they went to tell his disciples”. (Mt28:5, 9)
Mary went to the tomb, three times, Jn20:1, Lk24:1, Mk16:2, and Mk16:9 when she “had remained standing behind” until, Jn20:11, Jesus appeared to her, “first”, Mk16:9, and alone, “at the grave”, Jn20:16.
The other women also went to the tomb, three times, Lk24:1, Mk16:2, and Mt28:5 when “the angel explained” to them what had happened during the Resurrection, and Jesus, as “they went to tell his disciples”, appeared to them. (Mt28:5, 9)
The answer to the ‘Easter enigma’ (John Wenham) is simple: Each Gospel contributed to the whole with one of several sources; each added a personal part that, put together, will bring the whole story of the Resurrection into proper perspective.
Tradition – that is, the Sunday-resurrection approach – makes of these several stories of several visits, the one and simultaneous occasion of Jesus’ resurrection. Contradictions, discrepancies and total confusion are the inevitable result! It was bad enough that this ‘solution’ to a self-created ‘riddle’ was ever offered just to protect Sunday’s presumed status of being the day of the Resurrection. It became a comedy of tragic proportions when Sunday-protagonists began to defend their presumptuousness through unlawful improvements on the Scriptures.
JOHN 20:1,2 sets all visits to the tomb in motion:
“The first day of the week cometh Mary Magdalene early of dark yet [dusk / evening--'proh-i skotias eti ousehs'], unto the sepulchre, and seeth the stone taken away from the sepulchre.”